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Anomalous temperature evolution of the electronic structure of FeSe

Y. S. Kushnirenko, A. A. Kordyuk, A. V. Fedorov, E. Haubold, T. Wolf, B. Büchner, and S. V. Borisenko
Phys. Rev. B 96, 100504(R) – Published 15 September 2017
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Abstract

We present angle-resolved photoemission spectroscopy data taken from the structurally simplest representative of iron-based superconductors, FeSe, in a wide temperature range. Apart from the variations related to the nematic transition, we detect very pronounced shifts of the dispersions on the scale of hundreds of degrees Kelvin. Remarkably, upon warming up the sample, the band structure has a tendency to relax to the one predicted by conventional band structure calculations, directly opposite to what is intuitively expected. Our findings shed light on the origin of the dominant interaction shaping the electronic states responsible for high-temperature superconductivity in iron-based materials.

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  • Received 7 February 2017
  • Revised 7 August 2017

DOI:https://doi.org/10.1103/PhysRevB.96.100504

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Y. S. Kushnirenko1,*, A. A. Kordyuk2,3, A. V. Fedorov1,4, E. Haubold1, T. Wolf5, B. Büchner1, and S. V. Borisenko1

  • 1IFW Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany
  • 2Institute of Metal Physics of National Academy of Sciences of Ukraine, 03142 Kyiv, Ukraine
  • 3Kyiv Academic University, 03142 Kyiv, Ukraine
  • 4II. Physikalisches Institut, Universität zu Köln, Zülpicher Strasse 77, 50937 Köln, Germany
  • 5Institute for Solid State Physics, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany

  • *y.kushnirenko@ifw-dresden.de

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Issue

Vol. 96, Iss. 10 — 1 September 2017

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